how to develop a zero inflated weibull distribution in matlab
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Hey, I am trying to fit a weibull distribution to my dataset which consist of hourly wind speed. However when i plot my pdf, it is clear that there is an excessive amount of zeros within the data. This maybe since the value may have been too small to record. Does anyone have any idea how to handle zero inflation on a dataset or how to fit a zero inflated weibull distribution?
Jeff Miller 2018 年 4 月 1 日
1. You might replace the zeros with some small nonzero value (e.g., half-way between 0 and the smallest value that can be recorded).
2. Exclude the zeros and fit a truncated Weibull to the remaining data (with a lower truncation point being the smallest value that can be recorded). After you do this, you should verify that the fitted parameters predict about the right proportion of values below the truncation point (i.e., comparable to the percentage of zeros in your original data).
その他の回答 (1 件)
Vitaly Kheyfets 2018 年 5 月 8 日
I am not sure your original dataset would be considered zero-inflated. Yes, it has some zeros, but if you consider the zero as just another measurement, then the data still appears (roughly) normally distributed.
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